Portable rail-drill.



G. J. COULTER.

PORTABLE RAIL DRILL.

APPLICATION FILED 3313.19, 1912.

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I WITNESSES-I E MZN%H0R I v 1 1/ {QQM ATTORNEY C. J. OOULTER.

PORTABLE RAIL DRILL.

APPLICATION FILED 1113.19, 1912 1 1 1 5,402. Patented 001;. 27, 1914.

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G. J. GOULTER.

PORTABLE 'RAIL DRILL.

Patented 001;.27, 1914.

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CHARLES J. COULTER, OF HAMMOND, INDIANA.

PORTABLE RAIL-DRILL.

Specification of Letters Patent.

Patented Oct. 27, 1914.

1 Application filed. February 19, 1912. Serial No. 678,466.

1 '0 all whom it may concern Be it known that-I, CHARLES J. COUL'JIER, a citizen of the United States, residing in the city of Hammond, county of Lake, and State of Indiana, have invented a certain new and useful Improvement in Portable Bail-Drills, of which the following is the specification.

My invention relates to that class of drills, which are designed to drill railroad or street car rails, and has for its object to provide a simplified form of construction for drills of this type, and to provide for a quick and ready means whereby the drill may be readily detached from the rails and laid upon the ground, so as not to interfere with the passing oftrains.

My means of accomplishing these objects may be more readily understood by having reference to the accompanying drawings, which are hereunto annexed and are a part of this specification, in which:

Figure 1 is a side elevation of my im provement in'rail drills. Fig. 2 is an end elevation of the: same, the T-rail being omitted for the sake of clearness. Fig. 3 is a vertical section, showing the means for causing the quick return of the drill. Fig. 4-. is a fragmentary detail view showing the means for protecting the feed screw from Cinders, dust and dirt. Fig. 5 is a detail sectional'view taken on the line at one side i of the sprocket wheel.

Similar reference numerals refer to similar parts throughout the entire description.

As shown in the drawings, my machine consists of a lower rectangular frame 1, which is provided with upwardly extending lugs 2 and 3, to which is secured by means of pins or pivots the lower ends 4 and 5 of a frame which presents in end elevation the appearance of an inverted Y. The stem 6 I of the Y and one of the legs are formed in one piece which has near its upper end bearings 7, in which is rotatably mounted a shaft 8, which is provided with cranks 9 and 10, which are in turn provided with suitable handles 11. The shaft 8 carries a sprocket wheel 12, upon which is mounted a chain 13, which extends downwardly and engages the sprocket wheel, 14, mounted or formed upon a sleeve 15, which is adapted to receive a chuck 16, which carries the drill 17 for drilling the rail 18. The other member or leg of the frame is formed in two portions 19 and 20, which are hinged to-v gether as at 21. The members 19 and 20 are connected to each other by means of a handle 22. It will be apparent from an inspection of Fig. 2 that the connecting of the two members 19 and 20 in this manner permits.

the joint 21 to be passed beyond a line drawn longitudinally through the center of the leg and between pivot 23 and pivots 24, thus serving to hold the frame rigidly in position. l/Vhen, however, it is desired to lower the frame to the ground, the operator by grasping the handle 22, pulls the hinged portion outwardly, when it will be apparent that as soon as the pivot passes the center line that the frame may be laid prone. The rectangular frame 1 is provided with bearings 25 and 26. The bearing 25 has a sleeve 40 formed of an extension of the hub of a ratchet wheel 34, which is provided with an internal thread, which is fitted to and coincides with the feed screw 27. The result of this construction is obvious. The rotation of the cranks 9 and 10 causes the rotation of the sprocket 12 and through the medium of'the chain 13, the sprocket wheel 14 is rotated, carrying with it the sleeve 15, and as it is turned, the screw is advanced through the medium of the mechanism shown in Fig. 5, in which 28 is a cam formed upon the sleeve 15, the face of which contacts with a roller 29 secured to one end of a lever 30, which is fixedly attached to a shaft 31, the opposite end of which carries a lever 32 from which depends a pawl 33, which engages the teeth of the ratchet wheel 3-1, as it is alternately raised and lowered by the movement of the cam, thereby advancing the feed screw a proportionate distance.

When it is desired to retract the drill I make use of the mechanism provided for that purpose, more clearly seen in Figs. 3 and 4:, which comprises a wheel 35 splined upon the sleeve 15 and which is provided with a bevel face 36 and a recess 37, in which is mounted a shifting lever 39. The end, of the I wheel. 35 is provided with teeth 38 adapted to engage recesses 41 formed in the ratchet wheel 34:. The bevel face 36 engages one end of a pin 42 which extends from the pawl 33. It will be apparent that by moving the shifting. lever 39 and thereby causing the teeth 38 of the wheel 35 to engage the recesses ll in the ratchet wheel 3 1 that at the same time the pin l2 will be raised by sliding upon the bevel face 36, thus pushing the pawl 33 outwardly, and out ofcontact with the teeth of the wheel 3 f while the rotation of the crank in the opposite direction, when this has been done, will operate to return the drill very rapidly, the mechanism for feeding it being completely out of gear. As soon as the drill has been turned the sufficient distance the operator can move the lever 39 with his foot, disengaging the wheel 35 with the ratchet Wheel 34: and the ma chine is then ready for. work. is provided with a reduced neck orstem 50, which extends entirely through the feed screw 27, which is formed of seamless steel tubing having threads out upon the outer surface. The outer end 51 of the stem 50 is threaded and has a nut 52 mounted thereon. This permits the chuck 16 to be rotated, but prevents its longitudinal displacement and avoids the rotation of the feed screw 27.

As shown in Fig. 3, the drill is completely retracted. I provide for the end thrust upon the drill by inserting an end thrust ball bearing 5i intermediate the end of the feed screw 27, and a shoulder 55 formed upon the chuck 16, a similar one being mounted between the nut 52 and the end of the feed screw 27. The drilling mechanism is secured to the rail by means of my improved clamping device, which comprises two outwardly extending arms or hooks 4:3 and 4-4; held in spaced relation by the rod 72, the points of said loops being adapted to engage the T-rail 18, the inner ends of which are pivotally secured by means of pivots 4:6, to two outwardly extending arms 47 and 48, which are part of the rectangular frame 1. A transverse bar 4:9 is pivotally' attached to the member 48, the outer end 60 of the said bar being beveled and fitting to an opening ()1 formed in a hasp 62, which is hinged to the member 4L7, the result being that unlike two swinging clamps usually employed the pressure exerted by the hasp upon the bevel portion. of the bar 49 serves to secure the entire device rigidly to the rail without any tendency to pull out or loosen the spikes which secure the rail to the ties, and practically does away with the pivoted effect, making the hooks -13 and l4 to all intents and purposes rigidly secured to the arms 47 and 48. The hook shaped members 43 and 441- can upon the bar 41-9 being released from the haspbe swung back out of the way, as indicated by dotted lines in Fig. 3, when the drill has been laid down, leaving plenty of clearance between the rail and the drilling mechanism. As soon as the drill commences to cut into the T-rail 18, the points or hooks engage the T-rail so as to hold the drilling mechanism firmly in position. It frequently happens when the drilling mechanism is thrown down this way that the feed screw becomes covered with sand, cinders and dirt. I avoid this by use of my dust proof cover '63, more clearly seen in Figs. 3

The chuck 16 I and 4;, which fits over the end of the feed screw 27 completely incasing it, the sleeve 63 being secured to the end of the outwardly. extended hub of the ratchet wheel 34 by means of a set screw 64;, although it is obvious that it may be secured in any other convenient manner.

Having described my invention what I regard as new and desire to secure by Letters Patent is: r

1. The combination with a portable drill, of a frame having two upward and downwardly extending arms, clamping means secured to said arms, said clamping means comprising two rail engaging members pivotally attached to the upwardly extending part of the side arms,a transverse bar pivoted to the end of one of said members, the end of said bar being-beveled, an upwardly extending hasp secured to the other member and having a hole therethrough adapted to engage the beveled end of the transverse bar, whereby the said engaging members are held rigid with the frame.

2. A portable drill comprising the com- 'bination of an inverted Y-shaped frame, a

rectangular frame to which the lower ends of the legs of the inverted Y-shaped frame are pivotally secured, a rotatable sleeve mounted in said rectangular frame, a sprocket onsaid sleeve,'a sprocket mounted in the part of said inverted Y-shaped iframe,means to rotate said sprocket, a chain running on said sprockets,

a cam formed on the said sleeve, a shaft suitably journaled in'the rectangular frame, a lever fixedly attached to one end thereof,- a roller on said lever, which engages the said cam, a lever atthe other end of said shaft, a pawl depending therefrom, a, ratchet wheel having an outwardly extended hub j ournaled in the rectangular frame, a feed screw on which said ratchet wheel is threaded, the teeth of said ratchet wheel bei-ng engaged by the said pawl. I

A portable drill comprising the combination of an inverted .Y-shaped frame, a rectangular frame to which the lower ends of the legs of the inverted Y-shaped frame are pivotally secured, a rotatable sleeve mounted in said rectangular frame and sprockets on said sleeve, a sprocket mounted in the upper part of the inverted Y-shaped frame; means to rotate said sprockets, a chain running on said sprockets, a cam formed on said sleeve, a shaft suitably journaled in the rectangular frame, a lever fixedly attached to one end thereof, a roller on. said lever, which engages said cam, a lever at the other end of the said shaft, pawl depending therefrom, a ratchet wheel having an outwardly extended hub journaled in the rectangular frame, a feed screw mounted in the said ratchet wheel, the teeth said pawl, a wheel mounted'upon the sleeve a of said ratchet wheelbeing engaged; by the and having a beveled face, a pin attached to said pawl adapted. to engage said bevel face, means to shift the said wheel whereby its bevel face engages the pin to throw the pawl out of engagement with the teeth of the said ratchet wheel.

a. The combination with a portable drill-- ing mechanism of a chuck 1n which the drill is mounted, a rotatable sleeve mounted upon said chuck, said chuck being provided with a reduced end, a feed screw rotatably mounted upon said reduced end, means to prevent its longitudinal movement thereon, a ball thrust bearing intermediate the chuck and the said feed screw, a clutch wheel splined upon said rotatable sleeve, said wheel having a bevel face on one side thereof, a pin contacting with said bevel surface, a ratchet Wheel having internal threads fitted to the feed screw, a pawl for said ratchet wheel operatively connected to the said pin, said ratchet wheel being provided with recesses for engaging corresponding projections on said clutch wheel whereby the rotation of the clutch wheel operates to advance or retract the feed screw.

The combination with a portable drilling mechanism of a chuck in which the drill is mounted, a rotatable sleeve mounted upon said chuck, said chuck being provided with a ball thrust bearing intermediate the chuck.

and the said feed screw, a clutch wheel splined upon said rotatable sleeve, said wheel having a bevel face on one side thereof, a pin contacting with said bevel surface, a ratchet wheel having internal threads fitted to the feed screw, said ratchet wheel be ing provided with recesses for engaging corresponding projections on said clutch wheel whereby the rotation of the clutch wheel operates to advance or retract the feed screw, a cam on said sleeve, a lever operated by said cam, a shaft on which said lever is mounted, a lever at the end of said shaft, a pawl depending from said lever and adapted to engage theteeth of said ratchet wheel and cause its rotation through the medium of the cam, said cam being operatively connected to said pin, and means to shift said clutch wheel on the sleeve.

In testimony whereof I have signed the foregoing specification.

CHARLES J. GOULTER. l/Vitnesses:

C. M. BAUMEIsTER, K. DOLBEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. O. 

